中东地区主要碳酸盐岩沉积模式、储层特征及主控因素

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中图分类号：P618.13 文献标志码：A

Abstract：The MidleEastholdsnearlyhalfof theworld'srecoverable hydrocarbonreserves，predominantlyhostedincarbonatereservoirscharacterizedbymulti-scaleheterogeneity.Integrating multi-domainstaticanddynamicdata fromkeyoilfields inthe UnitedArab Emirates，Oman，Iraq，andIran，thisstudy proposesaunifiedclasificationframework encompassing five representative carbonate sedimentary models：ramp，rimmed platform，epicontinental sea ramp，evaporative platform，and submerged platform.Thesesystems exhibit dynamic transitionsgoverned bysea-level fluctuationsand tectonicactivities. Rampsand epeiric ramps initialldevelopthrough aggradation.Withinthe innerramp，high-energy environments promote the formationofbiologicalreefsorshoals，generating sedimentary highs.During transgresive phases，reef-shoal complexed expand，eventuallyevolving intorimmed platforms.Evaporative platforms form during sea-levelfallor tectonicuplift，whereas subsequent transgresionorsubsidence may transformthem into submerged platforms.Intheramp model，the mainreservoirs are iner-rampshoals；intherimmed platform，theyareplatform-marginreef-shoalcomplexes.Tidal channel facies within lagoons exhibithighpermeabiltybut strong heterogeneity.The epicontinentalramp modeldevelops typical spherulitic granularlimestonewith excelentreservoircontinuity，large scale，and weak heterogeneityTheevaporativeplatformshows intense evaporation in thesupratidalzone，wheredolomite，gypsum，and limestonecoexisttoformcomplexreservoirarchitectures. The submergedplatform mainlydevelops planktonic foraminiferal wackestones characterizedbyintrafosil porosity，poorconnectivity，the typical features of high porosity，low permeability，and weak heterogeneity.

KeyWords：Middle East region；carbonate rock；sedimentary model;reservoir characteristics；main controling factors

中东地区在全球石油可采储量中所占比例为48.3% ，其中超过 70% 为碳酸盐岩储层。（剩余22967字）